Andrew:
Aqua Seal will do the trick BUT if they are leaking at the seams in the bootee and are Simms you will void the lifetime warranty if you repair a seam. I don't know how the other manufacturers handle this issue but you may want to check if your waders have any type of warranty first before repairing.
...just a thought.
[This message has been edited by Bamboozle (edited 08 October 2005).]